<div>
    <table>
        <form action="/05duty_reg/reg.php" method="post" >
            <tr>
                <td>手机号码:</td>
                <td><input type="text" name="user_phone" value="15172113802"></td>
            </tr>

            <tr>

                <input type="hidden" name="step" value="step2">
                <button type="submit">下一步</button>
            </tr>
        </form>
    </table>
</div>